Book/Report

FZJ-2018-00724

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Untersuchungen am Plasma eines Wechselstrombogens in Methan

Heinrich, G. (Corresponding author)FZJ*

1976
Kernforschungsanlage Jülich, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/16675

Report No.: Juel-1338

Abstract: This report presents plasma-spectroscopical investigations of an a.c.-arc in methane, which were performed within the frame of studies about pyrolysis processes leading to the formation of pyrolytic carbon. The one- and twoatomic plasma-components are investigated in their spatial behaviour with the time. Parameters are the current strength (8 and 12 A ) , the electrodes' gap (2 and 4 mm) and the methane filling pressure (25, 50, 100, 170, 250 mm Hg). With the help of the concentration behaviour of C$_{2}$ and CH conclusions are available about their chemical activity. For measuring the temperature the rotational states of appropriate radicals are investigated for a Boltzmann distribution. The measurements of the temperature are also performed in their spatial distribution with the time-dependency on the plasma parameters. The thermal state (for example at local thermal equilibrium) should give a possibility for a fundamental theoretical description of the plasma. The electron-density as a fundamental electrical parameter will be determined in dependency on the plasma parameters from the Hg-line by line-broadening methods. Further electrical parameters are estimated there from: electrical conductivity, electron temperature, ionization temperature. In the plasma chemical irreversible processes were detected explicitly by the deposit of pyrolytic carbon on a carbon-filament. The deposit will be characterized by the methods used in pyrolyticcarbon-characterization.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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